Methane gas (ch4), on complete combustion in air, produces: 1. co2 2. h2 3. h2o methane gas (ch4), on complete combustion in air, produces: 1. co2 2. h2 3. h2o 1 and 2 only 2 and 3 only 1 and 3 only all of 1 and 2 only none of

Combustion equation of Methane:
CH₄ + 2 O₂ → CO₂ + 2 H₂O

So from the equation we can see that methane gas (CH₄) burned in air to give carbon dioxide and water

The provided choices are 1. CO₂         2. H₂         3. H₂O 

So from the choices the correct answer will be 1 and 3 only